The answer to 'why is my mini split not working' is that there can be several common causes, including refrigerant leaks, electrical issues, frozen coils, or problems with the compressor or other components. Symptoms may include the unit not turning on, poor cooling or heating performance, unusual noises, or water leaks.
In many cases, a mini split not working can be due to a relatively simple problem that a homeowner could potentially fix themselves, such as a clogged air filter or a tripped circuit breaker. However, more complex issues like refrigerant leaks or compressor failures often require the expertise of a professional HVAC technician to properly diagnose and repair.